fix: TypeScript build errors in WorkflowStepper and errorCodeHelpers

- Remove unreachable error type check in WorkflowStepper icon selection
- Remove error code display block that accessed non-existent properties
- Add missing shortName property to fallback error info objects

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

src/components/WorkflowStepper.tsx

@@ -451,7 +451,7 @@ export function WorkflowStepper() {
             };
 
             const Icon =
-              content.type === "error"
+              content.type === "warning"
                 ? ExclamationTriangleIcon
                 : InformationCircleIcon;
 
@@ -492,18 +492,6 @@ export function WorkflowStepper() {
                         ))}
                       </ul>
                     )}
-                    {content.type === "error" &&
-                      content.errorCode !== undefined && (
-                        <p
-                          className={`text-xs ${descColorClasses[content.type]} mt-3 font-mono`}
-                        >
-                          Error Code: 0x
-                          {content.errorCode
-                            .toString(16)
-                            .toUpperCase()
-                            .padStart(2, "0")}
-                        </p>
-                      )}
                   </div>
                 </div>
               </div>

src/utils/errorCodeHelpers.ts

@@ -388,6 +388,7 @@ export function getErrorDetails(
   if (errorTitle) {
     return {
       title: errorTitle,
+      shortName: errorTitle.length > 15 ? "Machine Error" : errorTitle,
       description: "Please check the machine display for more information.",
       solutions: [
         "Consult your machine manual for specific troubleshooting steps",
@@ -400,6 +401,7 @@ export function getErrorDetails(
   // Unknown error code
   return {
     title: `Machine Error 0x${errorCode.toString(16).toUpperCase().padStart(2, "0")}`,
+    shortName: "Machine Error",
     description:
       "The machine has reported an error code that is not recognized.",
     solutions: [